Waste water hydrogenation to reduce toxi- - city before microbiological purification

摘要

Waste waters containing dissolved saturated and/or unsaturated ketones or aldehydes and/or unsaturated alcohols are hydrogenated before charging to biological purification plants in order to prevent presence or formation of cpds. which inhibit decomposition activity of microorganisms. E.g. waste water containing inter alia 3-ketobutanol-1, methylvinyl ketone, methylbutenol and HCHO is hydrogenated, using Ni-Cu-Mn catalyst at 240 degrees C and 300 atm. H2. Filtered solution is separated into aqs. phase with carbonyl no. 1, iodine no. 0 and 2.54 wt.% C, which is further diluted in 1:20 ratio and charged to biological purification plant, and (b) organic phase which is burnt.